Explanation:
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The pH scale is a measure of how acidic a solution is.
<h3>What is a pH scale?</h3>
The unit of measurement to determine how acidic or basic a solution is, is done via a pH scale, which ranged from 0 to 14, on which 0 to 6.9 means that the solution is acidic, and 7 is neutral.
Hence, the pH scale helps to determine the acidic amount of the solution.
Learn more about pH scale here:
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Answer: C. frequency.
Explanation: Because the frequency is divided by the time during which it occurred. The term “frequency” in applied behavior analysis and behavior measurement generally refers to cycles per unit time or a count (usually of behavior) divided by the time during which it occurred.
